A 0.40-kg mass, attached to the end of a 0.75-m string, is whirled around in a circular horizontal path. If the maximum tension that the string can withstand is 400 N, then what maximum speed can the mass have if the string is not to break?
a. 370 m/s
c. 19 m/s
b. 27 m/s
d. 29 m/s
B
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The position of a particle moving along the x axis is given by x = (21 + 22t? 6.0t2) m, where t is in s. What is the average velocity during the time interval t = 1.0 s to t = 3.0 s?
A. ?6.0 m/s B. ?4.0 m/s C. ?2.0 m/s D. ?8.0 m/s E. 8.0 m/s
Motor 1 does 30 J of work in 10 s, motor 2 does 2 J of work in 5 s, motor 3 does 7 J of work in 2 s, and motor 4 does 7 J of work in 3 s. List the motors in order of highest power produced to lowest power produced
a. 2, 4, 1, 3 c. 1, 3, 4, 2 b. 3, 4, 1, 2 d. 3, 1, 4, 2
Correctly position these four planets within the accretion disk of our early Solar System based on the materials that were present where they formed.
What will be an ideal response?
Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has the same
A) mass. B) volume. C) weight. D) all of the above E) none of the above